I'm trying to pitch a game to a publisher, and while he seems to be liking all the mechanics, the fact that it's categorized as a dungeon crawler seems to be hurting my case, especially as it's totally not like dungeon crawlers

The game has a maze, made up of tiles. It's not a dungeon, it's a crazy scientist's lab. You can move your meeple(s) around, pick stuff up, play cards to temporarily disable other players, play cards to change the tiles around, etc. There are no hordes of dice (there is all of 1 dice in the game, to determine the difficulties of the built in sentry droids), and there are especially no hordes of orcs/zombies/whatevers.

It's like playing with a map of Panic Station without any other element of that game (no coop, no traitors, etc)

The emphasis is on getting to stuff ON the tiles, which may be blocked by built in traps, traps placed by other players, other players moving the tiles (yes, like amazing labyrinth), or directly by other players. So the game has a strong 'take that' aspect too. Adventure game does sound the closest, although it's very confrontational.